I have two machines running Ubuntu, one a 5-year old Pogo Linux desktop ("Pogo2011" running Ubuntu 16.04 LTS) and the other an 8-year old HP notebook ("HP2008" running Ubuntu 14.04). To date, I have gone through 10 Ubuntu installs or major version upgrades (including 4 on a 2003 Pogo Linux desktop, which I finally moved to Debian to keep it alive ("Pogo2003" running Debian 8.6)).
It has been my experience that Ubuntu OS upgrades do not generally produce...